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1. 发明授权

US5966065A Core for inductance elements and its production method 失效
标题翻译：电感元件的核心及其制作方法
公开(公告)号：US5966065A
公开(公告)日：1999-10-12
申请号：US879187
申请日：1997-06-20
申请人： Masahiro Onizuka , Koh Itoh , Sei Kakinuma
发明人： Masahiro Onizuka , Koh Itoh , Sei Kakinuma
IPC分类号： C04B35/26 , H01F1/34 , H01F41/02 , C01G49/08 , H01F27/28
CPC分类号： H01F1/342 , C04B35/26 , H01F41/0246
摘要： A core for inductance elements is formed of a sintered body of .alpha.-ferric oxide. The core has a flexural strength of at least 6 kgf/mm.sup.2 as measured by a three-point bending method, a specific resistance of at least 10.sup.6 .OMEGA..multidot.cm, a Vickers hardness of 800 to 1,500, and an iron content of 75 to 99.9 wt %, calculated as Fe.sub.2 O.sub.3. The core is produced by granulating, and forming a ferric iron powder, and holding a formed body for sintering at 950 to 1,500.degree. C. for 5 min. to 5 hours in an atmospheric environment.
摘要翻译：用于电感元件的芯由α-氧化铁烧结体形成。核心的弯曲强度至少为6kgf / mm2，通过三点弯曲法测量，电阻率至少为106欧米伽×厘米，维氏硬度为800至1500，铁含量为75至99.9重量％％，以Fe2O3计算。芯通过造粒和形成三价铁粉末并在950至1500℃下保持烧结成型体5分钟来制备。在大气环境中至5小时。

2. 发明授权

US6114940A BALUN transformer core material, BALUN transformer core and BALUN transformer 失效
标题翻译： BALUN变压器芯材，BALUN变压器铁芯和BALUN变压器
公开(公告)号：US6114940A
公开(公告)日：2000-09-05
申请号：US94473
申请日：1998-06-10
申请人： Sei Kakinuma , Kouki Sato , Masahiro Onizuka , Ko Ito
发明人： Sei Kakinuma , Kouki Sato , Masahiro Onizuka , Ko Ito
IPC分类号： C04B35/26 , H01F1/34 , H01F17/06 , H01F19/06 , H01F27/255 , H03H7/42 , H01F27/28
CPC分类号： H03H7/42 , H01F17/062
摘要： There is disclosed a BALUN transformer core material which has no magnetic permeability, contains a non-magnetic material and is not influenced by the frequency property of the magnetic permeability even in a high-frequency band. A BALUN transformer core which is obtained by pressing and sintering the BALUN transformer core material has no magnetic permeability and has a high specific resistance. A BALUN transformer which is obtained by applying a winding to the BALUN transformer core is a high-property BALUN transformer which can be operated in a high-frequency band of 600 MHz or more.
摘要翻译：公开了一种不具有磁导率的BALUN变压器芯材，其含有非磁性材料，即使在高频带中也不受磁导率的频率特性的影响。通过压制和烧结BALUN变压器芯材获得的BALUN变压器铁芯不具有磁导率并具有高电阻率。通过将绕组施加到BALUN变压器铁芯获得的BALUN变压器是可以在600MHz或更高频带内工作的高性能BALUN变压器。

3. 发明授权

US06335675B1 Semiconductor magnetoresistance device, making method and magnetic sensor 失效
标题翻译：半导体磁阻器件，制造方法和磁传感器
公开(公告)号：US06335675B1
公开(公告)日：2002-01-01
申请号：US09527808
申请日：2000-03-17
申请人： Sei Kakinuma , Masaichi Miyano , Katsuya Iwai
发明人： Sei Kakinuma , Masaichi Miyano , Katsuya Iwai
IPC分类号： H01L4300
CPC分类号： H01L43/12 , H01L43/08 , Y10T29/49082
摘要： A semiconductor magnetoresistance device having plural pairs of opposed short-circuiting electrodes (13) on the opposed surfaces of a semiconductor magneto-sensitive layer (12) shows a great resistance change relative to a magnetic flux density.
摘要翻译：在半导体敏感层（12）的相对表面上具有多对相对的短路电极（13）的半导体磁阻器件显示出相对于磁通密度的大的电阻变化。

4. 发明授权

US5906768A Ferrite magnetic material, and ferrite core 失效
标题翻译：铁氧体磁性材料和铁氧体磁芯
公开(公告)号：US5906768A
公开(公告)日：1999-05-25
申请号：US832769
申请日：1997-04-04
申请人： Sei Kakinuma , Yutaka Saito , Kensuke Ara
发明人： Sei Kakinuma , Yutaka Saito , Kensuke Ara
IPC分类号： C04B35/26 , H01F1/34
CPC分类号： H01F1/344 , C04B35/265
摘要： A ferrite core of the invention is useful for reducing the power loss of Ni--Cu--Zn ferrites, and so for particle accelerators, and power transformers. This core comprises a ferrite magnetic material containing as major components 47 to 50 mol % of iron oxide calculated as Fe.sub.2 O.sub.3, 10 to 25 mol % of nickel oxide calculated as NiO, 2 to 15 mol % of copper oxide calculated as CuO and 15 to 35 mol % of zinc oxide calculated as ZnO, and further containing as subordinate components 0.05 to 1.5 wt % of cobalt oxide calculated as CoO, 0.05 to 0.8 wt % of tungsten oxide calculated as WO.sub.3 and 0.03 to 0.5 wt % of bismuth oxide calculated as Bi.sub.2 O.sub.3, all based on the major components. Consequently, there is achieved a ferrite core having a power loss at 100.degree. C. of up to 210 kW/m.sup.3, and a power loss at 25.degree. C. of up to 140 kW/m.sup.3, as measured at f.multidot.Bm product=25 kTHz (f=1 to 10 MHz).
摘要翻译：本发明的铁氧体磁芯可用于降低Ni-Cu-Zn铁氧体的功率损耗，以及用于粒子加速器和电力变压器的功率损耗。该铁心包括铁氧体磁性材料，其主要成分为以Fe 2 O 3计为47〜50摩尔％的氧化铁，按NiO计为10〜25摩尔％的氧化镍，以CuO计为2〜15摩尔％的氧化铜和15〜35 以氧化锌计算的氧化锌的摩尔％，并且还含有作为CoO计算的0.05至1.5重量％的氧化钴的辅助组分，以WO 3计算的0.05至0.8重量％的氧化钨和以Bi 2 O 3计算的0.03至0.5重量％的氧化铋，都是基于主要组成部分。因此，在fxBm乘积= 25kTHz下测得的铁氧体磁芯在100℃下的功率损耗高达210kW / m3，在25℃下的功率损耗高达140kW / m3 （f = 1〜10MHz）。

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